Here is the full list of all 16 Dark Room VR achievements.
Kill 100 demons in the Medium difficulty level
Kill 80 demons in the Medium difficulty level
Kill 60 demons in the Medium difficulty level
Kill 40 demons in the Medium difficulty level
Kill 20 demons in the Medium difficulty level
Kill 100 demons in the Hard difficulty level
Kill 80 demons in the Hard difficulty level
Kill 60 demons in the Hard difficulty level
Kill 40 demons in the Hard difficulty level
Kill 20 demons in the Hard difficulty level
Kill 100 demons in the Insane difficulty level
Kill 80 demons in the Insane difficulty level
Kill 60 demons in the Insane difficulty level
Kill 40 demons in the Insane difficulty level
Kill 20 demons in the Insane difficulty level
Kill 10 demons in the Insane difficulty level